Cheap Flights from Boulder (WBU) to San Francisco (SFO)

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Find available prices by choosing your travel dates.
Flights from Boulder (WBU) to San Francisco (SFO)
Origin airport
Boulder Municipal
Destination airport
San Francisco Intl.
Distance
936 mi

Boulder to San Francisco Flights

The cheapest times to fly from Boulder to San Francisco

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Boulder to San Francisco are during the month of . You can find some of the cheapest flights from Boulder to San Francisco with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Boulder to San Francisco

Sunday is one of the best days to book for cheap flights from Boulder to San Francisco: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Boulder to San Francisco

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Boulder to San Francisco in 2025. You can also book with separate airlines for your outbound and return journeys, from one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Boulder to San Francisco flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Boulder to San Francisco airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Frequently asked questions

How much does a flight from Boulder, CO (WBU-Boulder Municipal) to San Francisco Intl. Airport (SFO) cost?
Discover the latest flight deals from WBU to SFO by entering your preferred travel dates and searching on Expedia. Easily compare prices by departure date if you have flexibility with your schedule and use handy filters to explore prices for your preferred journey. As a member of One Key™, our free loyalty program, you can use Price Tracking to watch fares and receive notifications if prices go up or down.
What is the cheapest month to fly from WBU to SFO?
The cheapest flights from WBU to SFO are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
Which airlines fly direct from Boulder, CO (WBU-Boulder Municipal) to San Francisco Intl. Airport (SFO)?
Although Boulder, CO (WBU-Boulder Municipal) has no direct flights to San Francisco Intl. Airport (SFO), other airports have nonstop options. Jetting off from Denver Intl. Airport (DEN) will get you to San Francisco without any layovers.
What is the cheapest airline that flies from WBU to SFO?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that’ll take you from WBU to SFO. Sort your results by “Price (lowest to highest)” to snap up a great deal.
How many flights per day from Boulder, CO (WBU-Boulder Municipal) to San Francisco Intl. Airport (SFO)?
You’ll have to catch a flight with a layover when traveling from Boulder, CO (WBU-Boulder Municipal) to San Francisco Intl. Airport (SFO). Direct flights don’t operate daily on this route. However, just filter your search to include one or more stops to find the best option for your trip.
What day of the week has the most flights from WBU to SFO?
Generally you’ll find the largest variety of flight choices on a Friday. Tuesdays are often the quietest.* However, this can change depending on the time of year, airline and other factors.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Boulder, CO (WBU-Boulder Municipal) to San Francisco Intl. Airport (SFO)?
To reach San Francisco Intl. Airport (SFO) without delays, book a flight that leaves Boulder, CO (WBU-Boulder Municipal) before 3 PM. The likelihood of cancellations is 22% higher, on average, for departures after this hour.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG’s global flight data platform.
Is it cheaper to buy a plane ticket from Boulder, CO (WBU-Boulder Municipal) to San Francisco Intl. Airport (SFO) last-minute?
Booking your flight from WBU to SFO shortly before your getaway is generally more expensive. However, if there’s some wiggle room with your itinerary, you could snag a cheap last-minute fare.
Is it cheaper to book a WBU to SFO flight and hotel package?
You can save money by booking a WBU to SFO flight and hotel package compared to booking separately. In fact, travelers could save hundreds of dollars by bundling with Expedia. And it’s simple to manage it all in one convenient place. Once you’ve selected your preferred accommodations and flights, you can add extras such as car rentals, tours and activities.
Can I cancel or change the date of my flight from Boulder, CO (WBU-Boulder Municipal) to San Francisco Intl. Airport (SFO)?
Typically, it’s possible to cancel or reschedule your WBU to SFO flight. However, for bookings made more than 24 hours ago, additional fees may apply. Refer to your airline’s policies in your itinerary to see what changes are possible and whether any costs are involved. You’ll also find more details on our Customer Service portal.

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*Available to One Key members.